電纜 R2X1N1N0A1T0A
在無任何原理圖狀況下要對一塊比較陌生的電路板進行維修,以往的所謂“經驗”就難有作為,盡管硬件功底深厚的人對維修充滿信心,但如果方法不當,工作起來照樣事倍功半。那么,怎樣做才能提高維修效呢?根據我公司進口設備維修中心統計出來的資料,應遵循以下幾個步驟、按順序有條不紊的進行。
方法一:先看后量
使用工具:萬用表、放大鏡
當手拿一塊待修的電路板,良好的習慣首先是應對其進行目測,必要時還要借助放大鏡,看什么呢?
主要看:
1、是否有斷線;
2、分力元件如電阻、電解電容、電感、二極管、三極管等時候存在斷開現象;
3、電路板上的印制板連接線是否存在斷裂、粘連等;
4、是否有人修過?動過哪些元器件?是否存在虛焊、漏焊、插反等操作方面的失誤;
在確定了被修無上述狀況后,首先用萬用表測量電路板電源和地之間的阻值,通常電路板的阻值都在70-80?以上,若阻值太小,才幾個或十幾個歐姆,說明電路板上有元器件被擊穿或部分擊穿,就必須采取措施將被擊穿的元器件找出來。具體辦法是給被修板供電,用手去摸電路板上各器件的
溫度,燙手的講師重點懷疑對象。若阻值正常,用萬用表測量板上的阻、二極管、三極管、場效應管、撥段開關等分力元件,其目的就是首先要確保測量過的元件是正常的,我們的理由是,能用萬用表解決的問題,就不要把它復雜化。
電纜 R2X1N1N0A1T0A
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Allen-Bradley(羅克韋爾),Schneider(施耐德),Siemens(西門子),GE(通用電氣),ABB,
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Westinghouse(西屋),Honeywell(霍尼韋爾),Panasonic(松下),Mitsubsihi(三菱),
Beckhoff(倍福),Yaskawa(安川),Pepperl+fuchs(倍加福),B&R(貝加萊),Danfoss(丹佛斯)
,Fuji(富士),Festo(費斯托),Phoenix(菲尼克斯),Koyo(光洋),Yokogawa(橫河),
Heidenhain(海德漢),Hydac(賀德克),Hirschmann(赫斯曼),Keyence(基恩士),Moeller(穆勒),
Kuka(庫卡),Kollmorgen(科爾摩根),Lenze(倫茨),Rosemount(羅斯蒙特),LG,LS(產電),
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SMC,Sanyo(三洋),Delta(臺達),Turck(圖爾克),Sick(施克),Sharp(夏普),Eaton(伊頓)
,bently (本特利)
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